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 // Copyright (c) 2009, Google Inc.

 // All rights reserved.

 //

 // Redistribution and use in source and binary forms, with or without

 // modification, are permitted provided that the following conditions are

 // met:

 //

 //     * Redistributions of source code must retain the above copyright

 // notice, this list of conditions and the following disclaimer.

 //     * Redistributions in binary form must reproduce the above

 // copyright notice, this list of conditions and the following disclaimer

 // in the documentation and/or other materials provided with the

 // distribution.

 //     * Neither the name of Google Inc. nor the names of its

 // contributors may be used to endorse or promote products derived from

 // this software without specific prior written permission.

 //

 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 // A wrapper for libcurl to do HTTP Uploads, to support easy mocking

 // and unit testing of the HTTPUpload class.

 #include <string>

 #include <map>

 #include "common/using_std_string.h"

 #include "third_party/curl/curl.h"

 namespace google_breakpad {

 class LibcurlWrapper {

  public:

   LibcurlWrapper();

   virtual bool Init();

   virtual bool SetProxy(const string& proxy_host,

                         const string& proxy_userpwd);

   virtual bool AddFile(const string& upload_file_path,

                        const string& basename);

   virtual bool SendRequest(const string& url,

                            const std::map<string, string>& parameters,

                            string* server_response);

  private:

   // This function initializes class state corresponding to function

   // pointers into the CURL library.

   bool SetFunctionPointers();

   bool init_ok_;                 // Whether init succeeded

   void* curl_lib_;               // Pointer to result of dlopen() on

                                  // curl library

   string last_curl_error_;  // The text of the last error when

                                  // dealing

   // with CURL.

   CURL *curl_;                   // Pointer for handle for CURL calls.

   CURL* (*easy_init_)(void);

   // Stateful pointers for calling into curl_formadd()

   struct curl_httppost *formpost_;

   struct curl_httppost *lastptr_;

   struct curl_slist *headerlist_;

   // Function pointers into CURL library

   CURLcode (*easy_setopt_)(CURL *, CURLoption, ...);

   CURLFORMcode (*formadd_)(struct curl_httppost **,

                            struct curl_httppost **, ...);

   struct curl_slist* (*slist_append_)(struct curl_slist *, const char *);

   void (*slist_free_all_)(struct curl_slist *);

   CURLcode (*easy_perform_)(CURL *);

   const char* (*easy_strerror_)(CURLcode);

   void (*easy_cleanup_)(CURL *);

   void (*formfree_)(struct curl_httppost *);

 };

 }